I was wondering if someone could turn the single player campaigns into 2 player co-op via the Archon Mode feature. That way, the maps dont really need to be redesgined with added base space or resources etc, the gameplay just allows the army to be controlled by two players.
It's a neat design challenge to make a one-player mission into a two-player one - whether that style be using Archon Mode or a Co-Op one.
For instance, take Brood War's Episode 4 Mission 6, "Return to Char". The player is given one Protoss camp, and one Zerg camp, to complete the mission. Sounds like a straight-up Co-Op mission, to me. OR you could take the Archon way and in-game explain that Artanis and Kerrigan are both controlling his units AND her swarm. Hmm. No, that doesn't seem right. Co-Op it should be for that mission.
But take Brood War's Episode 6 Mission 5, "True Colors", into consideration - one army vs. two factions - and Archon Mode would work wonderfully there!
However, there are many missions that wouldn't really need an Archon or Co-Op Mode to make them enjoyable. Sometimes, like WoL's Ghost of a Chance, it wouldn't make sense.
Yes, Blizzard is against putting out official SP maps with modded content.
For a custom campaign, however...
Like I said, it's a neat design challenge for campaign makers out there.